Attachment for mixing chambers



Feb. 19 1924.;

' J. H.AHLERS ATTACHMENT FOR MIXING CHAMBERS Filed April 18, 1922gwuawto'n J' zi /212261 5.

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1 TopaZZ who'm z't may concern Patented Feb. 19, 1924.

ATTACHMENT non Mixme cnaiasnns.

Application filed April 18, 922; Serial K555554 51 Be it known that I,JOHN Antares, citizen of the United States, residing at Ponder, in thecounty of Thurston and State of Nebraska, have invented certain new anduseful Improvements in Attachments for Mixing Chambers; of WlllOh. I

' nection w th theusual cover and rising from the following is aspecification.

This invention relates to an improved at taohment for the mixingchambers of Ford son tractors and seeks,-as one of its principalobjects, to provide a device which will,

when the engine of a Fordson tractor is started or stopped relieve back.pressure in the mixing chamber of the engine to prev vent overflow ofthe engine air washer.

A further object of the invention is to provide a device which will makeit possible to easily prime the tractor engine when starting.

And the invention has as a still further object to provide a devicewhich may be readily applied to the mixingchamber of a tractor in lieuof the usual cover platefor said chamber.

Other and incidental objects will appear hereinafter.

In the drawings:

Figure 1 is a sectional view through the mixing chamber of a Fordsontractor showing my improved device applied, and

Figure 2 is a perspective view of the device in detail.

Referring now more particularly to the drawings, it will be seen that Ihave shown my improved device in connection with a conventional mixingchamber of a Fordson tractor. The chamber is indicated at 10, thischamber being provided with an in let nipple 11 and being formed at itslower side with an outlet pipe 12. Fitting in the chamber axiallythereof is an air valve guide 13 and surrounding said guide is an airvalve 14 cooperating with a flange 15 depending into the casing. Mountedin the nipple 11 is a valve 16. All of this structure is conventionallyshown, being typical of the usual mixing chamber as found upon F ordsontractor. In this connection, it may be noted that the nipple 11 isconnected by a suitable pipe with the air washer of the tractor, throughwhich air washer the primary supply of air is drawn to the mixingchamber but sincesaid air washer forms no part of the present in- HERMANvention, it has notbeen shown. In carry- JOHNHERMAN AH Ens,orfrnnnnannnnasxli.

ing the invention into effect, I provide a.

coverpla'te 17 fwhi ch'is formed to fit the. chamber at its upper endand takes the place of the usual cover plate for the chamber. The coverplate 17 is secured by the customary cap bolts 18 provided in conthecover 17 is a U-shaped valve guide 19. This valve guide is formed atitsends with lugs 20 seating flat against the cover and threaded throughsaidv lugs are screws 21 detachably connecting the guideto the cover.Threaded or otherwise mounted. upon the upper horizontal portion oftheguide is a guide sleeve 22 lying axially of an opening 23 in the coverand normally closing said opening is a valve 24, the wall of the openingbeing beveled to seat the valve. Rising from the valve is a stem 25,slidably received through the sleeve 22 so that the stem coacts with thesleeve for guiding the valve, the valve normally gravitating to closedposition and, as will be observed, the stem projects at its upper endabove the guide 19 so that said stem may be readily grasped for openingthe valve. 17 at opposite sides of the opening 23 therein, are stops 26having reduced upper terminals extending through the cover and upset forconnecting the stops with the cover chamber of the engine into the airwasher, pressing down the float thereof and raising the water in theairwasher which is thus caused to overflow. However,ras will now beunderstood in view of the preceding (lee scription, the valve 24 will,when. back pres-" sure enters the mixing chamber, be automaticallylifted so that the back pressure in said chamber will be permitted toescape therefrom and consequently will not reach the air washer.Accordingly, the valve will Depending from the cover.

sets up a back pressure through thefmixing function to automaticallyprevent overflow of the air washer. It has been deemed u nnecessary toshow the a1r washer since such.

air Washer is a conventional part of a Fordson tractor. Under normalcircumstances, the valve will not only be held closed by gravity but bysuction in the mixing chamber as well so that leakage of air past thevalve into the chamber will be prevented. In cold weather, the valve maybe lifted when a quantity of gasoline orother suitable priming fluid maybe introduced into the mixing chamber 10 for priming the engine so thatthe engine may thus be readily started. I accordingly provided'aparticularly-eflicient device for the purpose set forth and, as will,now be appreciated, a device which may be readily applied.

Having thus described the invention, what is claimed as new is: i I

1. The combination with a mixing chamber having an air valve guidetherein, and an air valve associated with said guide within the chamber,of a closure for the chamber,

means carried by the closure to coact withv thereof with an outletnipple, and an air valve guide fitting in the chamber and re movable atthe upper end thereof, of a plate secured to the upper end. of thechamber closing the chamber, stops depending" from the plate andprovided at their lower ends with laterally directed lugs overhangingthe upper edge of the valve guide securing the guide against upwarddisplacement, the plate being provided with a vent opening, a yokeupstanding from the plate straddling said opening, and a vent valvesustained by said yoke normally closing said opening.

In testimony whereof I aillix my s gnature.

JOHN HERA/IVAN AHLERS. 1a. s]

